Pipe cutting-off and rounding machine



Dec. 14, 1926. r 1,610,463

3.v E. MIRFIELD ET AL PIPE CUTTING-OFF AND ROUNDING MACHINE F d April 22, 1922 10 Sheets-Sheet 1 $5 H 6 f,1 vsuron V Mam/h,

Dec. 14 1926. 1,610,463

G E. MIRFIELD ET AL PIPE CUTTING-OFF AND ROUNDING MACHINE Filed 1 22. 1922 10 Sheets-Sheet 2 Dec. 14. 1926. 1,610,463

G. E. MIRFIELD ET AL PIPE CUTTING-OFF AND ROUNDING MACHINE Filed A ril 22. 1922 10 Sheets-Sheet 5 i i i I 2a I 22 I 22 26 23 30 w VENTORS 31 a V )V. r 24 MW Dec. 14 1926. 1,610,463

10 Sheets-Sheet 4 WWW @Z M, JM

Dec. 14. 1926. 1,610,463

G E. MIRFIELD ET AL PIPE CUTTING-OFF AND ROUNDING MACHINE Filed April 22. 1922 10 Sheets-Sheet 5 ZVENTQR? .2

Dec. 14 1926. 1,610,463

G. E. MIRFIELD El AL PIPE CUTTING-OFF AND ROUNDING MACHINE Filed April 22. 192? 10 Sheets-Sheet 6 Dec. 14, 1926. 1,610,463

G. E. MIRFIELD ET AL PIPE CUTTING-OFF AND ROUNDING MACHINE I Filed April 22. 1922 10 Sheets-Sheet v Dec. 14, 1926. 1,610,463

G. E. MIRFIELD ET AL PIPE CUTTING-OFF AND ROUNDING MACHINE Fi d April 22, 1922 '10 Sheets-Sheet s fgJZ. 1791 Dec. 14 1926.

1O Sheets-Sheefi' 10 Filed April 22. 1922 NNN MNN

Patented Dec. 14, 1926.

v UNITED STATES 1,610,463 PATENT OFFICE.

GEORGE E. MIRFIELD AND WIILIAM M. NECKERMAN, OF YOUNGSTOWN, OHIlIO.

PIPE CUTTING-OFF AND ROUNDING MACHINE.

Application filed April 22, 1922. Serial No. 555,972.

Our invention relates to pipe machines and particularly to such machines for cutting ofi, rounding and chamfering the pipe.

In a machine embodying our invention the only manual operations required are those of placing the pipe in the machine and removing the same from the machine after the desired operations have been completed. On account of the automatic features of the machine wherein the pipe is clamped, cut oil', rounded and chamfered and unclamped in succession and without manual manipulation, a great saving in labor and a substantial increase in the amount of material handled are effected, thus considerably decreasing the cost.

Our invention will be better understood by reading the following description taken in connection with the accompanying drawings forming a part thereof, and in which:

Figure 1 is a plan view of a machine embodying our invention;

Figure 2.j s a side elevation of chine;

Figure 3 is chine;

Figure 4 is a plan View of a portion of the machine, showing the head rotated 90 from the position shown in Fig. 1.;

Figure 5 is a sectionon line V-V of Figthe ma- I an end elevation of the maure 6;

Figure 6 is a section on line VI-VI of Figure 1. with the brake and its operating mechanism omitted:

Figure 7 is a longitudinal section through the expanding mandrel, and including a porticn of the clamping means showing the same inside the pipe;

Figure 8 is a section on line VIIIVIII of Figure 7 with the pipe and the clamping means omitted; l

Figure 9 is a fragmentary view of the resetting device; v

Figure 10 is a section online XX of Figure 1; t

Figure 1 1 shows a detail of the locking means between the rack bar and headj Figure 12'is a section on line XII-XII of Figure'10;. i t

Figure 13 is a section on line XIIIXIII of Figure 12;

Figure 14; is a fragmentary view showing the clutch operating mechanism;

Figure 15 shows a portion of the reversing switch mechanism in elevation;

Figure 16 shows the mechanism for disconnecting the motor at the end of the cycle; Figure 17 is a partial section on line XVIIXVII of Figure 2, showing the cutting tools and means for holding and adjusting the same; and

Figure 18 is a view showing dia rammatically the electrical circuits an the means for controlling the same.

In describing the machine and its operation, the description will be divided into four parts in order that the same may be better understood. Theparts into which the description will be divided are first, clamp; ing the pipe; second, cutting off the pipe; third, rounding and chamfering; and fourth, unclamping the pipe. The arts of the machine are mounted upon a ase 1 of the desired size and configuration. Mounted on the base 1 is an electric or other motor 2. The motor is provided with a shaft 3 upon which is secured a pinion 4. The pinion 4 meshes with the gear 5 carried on the shaft 6 and mounted 1n bearings 7 and 8 and supported b hearing blocks 9 and 10 suitably fastene to the base 1. The shaft 6 carries the pinion 11 which meshes with the gear 12 mounted on a shaft 13, which is carried in bearin 14 supported by'bearing blocks-16 suitably fastened to the base 1. The shaft 13 carries a pinion 17 which meshes with the gear 18, which is rotatably mounted on a flange 19 of the pipe receiving drum or barrel .20. The drum 20 is mounted in bearings 21 carried by bearing blocks 22, suitably supported by and attached to the base 1. The gear 18 is mounted on a flange 19 on the outside of a ring 23 attached to the flange 19. The gear 18 is rovided on its periphery with .teeth 24 and on the face with beveled teeth 25, as shown in Figures 5 and 6. Attached to the flange 19 of the drum 20 is a supporting member 26. The supporting member 26 is attached to the flange 19 by bolts 27 shown in section in Figure 5. Rotatably mounted in themember 26 are two sleeves 28 best shown in Figures 15 and 6. These sleeves are provided internally with screw threads and a lock nut 29 having a flange on the end thereof is screwed into the end of the sleeves 28 for the purpose of holding the sleeves in position. The sleeves are provided with flanges corresponding in function to the flanges on the lock nuts 29.

A bushing 30 of bearing material surrounds 30 which act as bearings. Mounted on the flange 39 which acts as a hrak sleeves 28 are beveled pinions 31 which mesh with the teeth 25 on the gear 18. Mounted inside of the sleeves 28 are screw members 32 having threads thereon fitting into the threads on the inside of the sleeves 28. The members 32 have flanges 33 thereon which "are attached to clamping jaws 34 by means of bolts 35. The clam mg jaws 34 move in a radial direction an are guided in their movements by guides 36, which guides are attached to the supporting ,Xnember 26. Each of the clamping jaws 34 is provided with a semi-cylindrical cut-away portion adapted to fit theexterior of a pipe 37 as shown in Figures5 and 6. The arrangement of the parts described is such that upon a relative movement between the gear 18 and drum 20 the pinions 31 will be rotated and the clampin jaws moved inwardly or outwardly depending upon the direction of this relative movement. This movement of the clamping jaws effects a clamping or an unclamping of the. ipe.

A casing 38 is p aced ing device as shown in Figures 5 and 6. This casing has a central opening to permit the passage of the pipe therethrough, as shown in Figure 6.

The drum or barrel 20 is provided at its end opposite the clamping jaws with a e drum. Surrounding the brake drum 39 is a brake shoe 40. as shown in Figure 3. This shoe is divided into two substantially equal parts, each of which is pivotally carried by the bolt 41, which is so ported by a projection 42 on top of one o the bearings 21 of the drum 20. The parts of the brake band are connectedat their other ends through connectors 43 and .44 with a lever 45 which is pivoted at- 46 to a support 47, which is secured to the base of the machine by bolts 48. The connectors 43 and 44 are pivotally connected to lever 45 at the points 49 and 50,

which are substantially equidistant from the pivotal oint 46. Connected to the other end of ti: core 51. The core '51 is connected tothe lever 45 through a link 52. The solenoid core 51 is actuated in its upward direction ha a coil 53.. When released the weight of t e core and the lever 45 acts to release the brake shoes from the brake drum. One of the brake shoes 40 has an opening cut therein and through which is introduced a h'iction shoe-54 which bears directly against the brake drum 39; The opening is somewhat longer eircumferentiall than the shoe 54 for a purpose which wi appear later. The shoe 54 has an exwasion 55 which extends around the clamp e lever 45 is an operating solenoid outward radially through the opening in the brake shoe and this extension 55 is provided. with shoulders against which the member 56 rests. The member 56 is pivotally connected at 57 with the brake shoe and extends upwardly as shownin Figure 3, and is provided with a slot through which the extension 55 passes. A coiled spring 57 bears against one face of the member 56 and acts to hold the shoe 54 against the brake drum. The spring 57 surrounds a rod 58 which passes through is pivoted at 59 to the brake'shoe. One end of the spring bears against the face of the member 56 and the other end bears against a collar 60 held in place on the rod 58 by a nut .61. By screwingl the nut in one direction or the other, t e compression of the spring 57 may be changed so as to chan e the friction of the shoe 54 against the bra e drum.

A. bracket 62 is mounted on the frame of the machine which carries a switch mechanism 63 which controls the circuit through thesolenoid 53. The operating member 64 of the switch mechanism 63 extends downwardly, as shown in Figure 3. The extension 55-carries an adjustable belt 65 which is screwed into the extension 55 and held in position by a lock nut 66. The bolt 65 is adapted to engage the member 64 and actuate the switch mechanism to open the circuit of the coil 53 for a purpose which will appear hereinafter,

The extension 55 is provided'with a pin 67 which enters into an elf; ated slot in a link member 68. The mere er 68 is connected at its other end to a lever 69 which is rigidly connected to a shaft 70. The shaft 70 is-carried in bearings 71 which are supported by the base 1, as shown in Figure 2. The shaft 70 carries an arm 71, upon which is placed a cpunterwei t 72, shown in Figures 1 and 15. The s aft 70 also "carries a lever 73 which is pivotally connected to a link 74, as shown in Figure 2. The link 74 extends parallel with the barrel 20, as shown in Figure 1, and connects at its other end with a lever 75, as'shown in detail in Figure 14. The-lever 75 is pivoted at 76 to a member 77, which is attached to the base 1.

the member 56 and- The other end of the lever 75 is provided with a pin 78, which works in an annular slot 79 in a clutch member 80, which rotates carrying a gear 84 which meshes with the 7 gear 12, as shown in Figure 1. As soon as the clutch members 80 and 82 have been engaged the brake coil '53 is deenergized and the brakes are released. The circuit of the coil 53 is held open by the coil 226 as long 'ber 89, which he} 1 member 82, as

, is carried in as themotor speed is suificientto energize the coil to holdup the switch member 63. A s rin actuated member 85 is placed, near t 1e dutch member BO'and has a pro- 'ection' 86 adapted to. enter the annular-"slot 9 when the. clutch member 80 has been .moved intomeng agement with the member 87 is so. arranged that at a predetermined point in the rotation of the clutch member 80, the projection 86 will beremoved from the slot 9 so that the clutolmember 80 ma H be moved out o engagement with thdelu'tc ill be explained later. The shaft 81 is prov ded with a-cy-l indrical mema cam groove'90 out in the eirciunference th reof, as shown in Figure 2; :One end of the bait 81 is journalled at 91 in the base 1 of the machine; a The other end a bearing supported by the base 1. I

The base 1 is provided with guide-ways 92, as shown in Figures 2 and 4. A carriage 93 is' mounted upon theguide-ways 92 and.

- carries a head 95. This head is carried by arms 96 which are attached to a hub 97, pivotally mounted on a cylindrical portion 98 of the carriage 93, The parts just described are shown in detail-in Figure 10. 7

Extending through the cylindrical portion .98 offthe carriage is a shaft 99. The shaft .99 is mounted in the .portion 98 of the carriage-in ,a sleeve 100 of bearing material and the said shaft is thereforefree to rotatein the portion 98. The shaft 99 is provided with a key-waywhieh registers with a corresponding key-\vav. in the. hill) 97 and upon the placing of tl1e kev 101 in position as shhwn in Figure 10, the hub 97 is fixed to the.-

shaft 99,, so that it rotates therewith.

The shaft99 is provided at its lower end with a pinion 102. This pinion meshes with.

a me]: 103. The rack"103 has'an upturned 3 end portion 104 into which is screwed an ad'justing screw 105 held in adjusted position by lock nut 106. Connected to the-rack .103 is a link 107 which eonnects with alever 108 .pivoted to thebase l'at 109. This lever is provided with a p n carrying an anti-frietion roller 110, which roller runs in the cam groove 90in the member 89, as shown in Figure2. The partsso. far described are the connechtions through which the rounding and-chamfering operations are eflected.

- Thenext operation after the pipe has been clampedis that of cutting off .the pipe.v This prises a earn 111, whichis fixed ,to theshaft pivoted at 113 and carries an anti-friction roller 114, which engages with the cam 111., The lever 112 is connected at its other end to the. link115. This linkis connected to members 116 and 117, which are connected together by a turn buckle 118. Tool holders 119and 120 are mounted on the base 1 of the machine on. guideways ofany suitable construction. The holders 119 are adapted to receive the tools 121mcutting oif the pi e. The .tool 7 holders are each provided with downwardly extending projections 122 which are rovided with projections 123 adapted to be engaged by an eccentric 1241 The ecoentrics 124 are, mounted on shafts 125, which shafts also carry arms 126 'pivotally connecting with the members 116 and 117.

The members 122 are carried by bolts 127 the'bolts 127, the position of the members .122 with respect to each other may be changed,'and also by this arrangement the tool holders 119 and 120 may be adjusted to accommodate the machine. for difierent sizes of p Y a relative adjustment of the position of the toolholdersmay be accomplished by the turn buckle118. Mounted loosely upon the shaft .81'is a bell crank lever 129. One end of this leyer connects .with' the lever-112 .throu h a link 130. The other end is terweight131..- A In the operation of the devicethe' rotation ofthe cam 1'11 rotates the lever 1 12 in a provided wit a counr,

clockwise directiomas viewed in Figure 17.

pipe which is rotating. .As soon as the cam 111 has passedthe roller 114.. the counterweight acts'upon the lever 112 to movethe same in a counterclockwise directionand; has the eflect of'separating the tools from the 'pipe and returnin'gthm to their original 4 positiom a V We will now describe the operation of rounding and chamfering the end of the As heretofore stated, the head 95, Figures 1, 2, 4 .and- 10,' ,isrotatably mounted onthe carriage 93.. Thishead is normally in the .positioh shown inEigures 1 ,and 2, ,that is' to say, out of line with. the" pipe being operated .upon. When the shaft 81 car ingthe "cylindrical member 89'. has .rotate to the proper point the'cam groove 90 so aets u on the lever'108 as to move the same aroun its 81'and rotatevherewithi A lever 112 is .pivot .109 inya clockwise direction. This movement is transmitted throu h the link 107 to the rack 103. The no moves to the right, as shown in, Figure 10, until the end of the pin 105, strikes the carriage 93 at the point 135. The carria e 93 durmg this movement of the rack is tion of amember 136 against the side of the guides 94. As illustrated in Figure 12,

this friction is regulated by a spring 137 thec'arriage along'the guides 92 so that the head 95 will be moved into the end of the pipe. The rack 103 is provided with a slot 141 which is brought into alignment with a similar slot in .the carriage-93 and in which a locking bolt 142 normally rests. This bolt, as shown in Figure 11,- isivotally connected to a, lever 143, provide with a roller 144 at one .end' and pivoted at the other end at-145 to the carriage 93. The roller 144 is adapted to roll upon the cam 146 attached to the frame of the machine. .After thecarriage has moved to the ri ht a suflieient distance for the roller to run own the face of the cam 146, the bolt 142 will pass into the slot 141 in the rack and lock the carriage to the rack.

The portion-98 of the carriage carries a pin 147 which has a roller.148 mounted on the lower end thereof, as shown in Figures 12 and 13. The pin is mounted in a recess 149 in the portion '98 and is surrounded by a s ring 150 which normally-holds the pin Q enindg in t e position shown in-Figures 12 and 13.

One of theguides 92 .is cutaway at 151 and a tapered member 152 is fastened thereto by a counter-sunk bolt 153. The member 152: path of the' constitutes acam surface in the roller 148. The hub 97 which 1s mounted on the shaft 99' is provided with an opening toreceive the pm 147. This opening is sopositioned with'respect to thepm as t register with the; openm in which: the in is placed when the head as been rotate to the position shown in Fi e 4. As soon .as the carriage has move 'on-the ides .a dlstancesulficient -for the frolleril to run up the cam 152., the pin 147 will enter the I in the 'dru n 97 and lock thedrum 9 ..an the portlon .98together. By this arrangement gtheflintermeshing' teeth "on the rack 103 and thefgear 102arerelievednf the strain incidental to th rounding and charm 'fe insop a iqn either e. I shaft 81 .c niiiiluesxto rotate as ad by-the an:

in .Figure with the moved to t e right and the end of the head enters the ipe. A,

The hea 95 is shown in detail in Fi ures 7 and 8. This head comsrises a eylin ical body 154 which is provi e with a central bore. and three radial open ngs 155 leading from the centralbore to the circumference of the body 154. The body 154 also has a reduced portion 156, as shown in Figure 7. Placed in the openings 155 are rollers 157, the ends of the rollers abutting against heads 158 on the body 154. The rollers have re= duced ends .159 provided with annular placed. Correspon ing ginnular grooves are also provided inth body 154. The springs act to hold-the r0 ers in enga ement with grooves 160, dn'whgch coil springs 161 are reventthe rollers from falling out of the ody 154 through the circumference thereof.

Ei-pe the carriage is then an expanding member 162 an also act to Placed inside of the central bore of the body 154 is the cylindrical expanding member 162, which .is slightly ta cred, as shown in Figure '7,and is attac ed to a carrier rod 163 by a bolt 164. The carrier rod 163 extends through the body 165 the'pin 168 projects. Surrounding the: car'- rier-rod 163 is a compression spring 171 one end of whichbears against one endo the member 162 ,and the other end of which bears against the body 165. The spring 171 therefore tends to ush the member 162 to the right-as ,viewedPin'Figure 7. H Surrounding? sion spring 1 2, one end of whic ars against the end of-the reduced portion 156 of the body 154 and the otheren'd of which spring bears against the body165: The

he spring 171 is a com resspring 172, therefore, tends atoll times to force the body 154 to the right, as viewed 7. The sleeve 166 is,.provided with aset screw 173, the inner end of which enters a slot- 174 in the reduced portion 156 of the body 154.. The pin 173 therefore limi-tfi pthe relative longitudinal movement.

between the 154 and the sleeve 166. 'Thecmier rod 163-hae a-rcdncedthreaded portion 175m theend .thereofwhich ex tend u wardly thro h an opening in the body member "165. knurled Jmt176' is screwed onto thenic 175 and bears a nstthaendzqf euhody 165. The not 1' 6 therefore limits the movement of the as shown in Fi carrier rod and themember to the righit, s

' ,lock nut for the nut'176.;

l is.

ure 7 A second nut 17 .1175 and acts as a The p pe is rotat'ing'and as will be noted by reference to Figures land 4 the rollers 157 are placed in the member 154; at a sli ht angle to the axis of said member. At t 's screwed onto e portion point in the operation it"is' desirable that thepin 168-be removed from the notch 167 to enable the member 162 to expand the rollers. This operation is accomp the followin'g means 'Apin 186 ,extends through the shaft 99 and I at one end wit a member 187 to the guides 92. A-leve'r 188 is pivoted at 189 to a projection 190 on the '97., :The in 186-is ggivotally connected .st1191with e lever 1 I I Figure-mend extends into a slot 192 in the I tojthe .ri

t e rollers outwardly radially to pind168;t; A51- .the-c|;11gage moves over the e-Wayse pm' engages a cam surface .198 onthe member 187 and is forced y. The upward movement of the .upwardl I {p n lflfisoauses an upward movement of the pin 168 and releases the same from the notch 167' inrthe carrier 163.

' Upon" the removal of thepin 168 the [spring- 171 pushes the tapered member 162 in the head which isv useful at the point in 5 on a bolt-182,18 I II I .One endof the lever 180 is pgovidedfwith the operation when the head is entering the end of-th'e pipe The parts as'shown-in Figure '7- are'in the EOSitlOI! which the assume at the end of feringoperation.

The expanding member .162 is reset as follows:-' I I I f I I The carrier rod 163 is provided with a pin 178, as shown in Fi I I for the. urpose of moving t e carrier rod 163 to t e sit, as viewed Figure 7, so th'at'the pin 168 will enter the notch 167 and. hold the carrier. rod 163 retracted ositionf The means for actuating the pm l68 will now bedes'cribed.

. A projeetion-179'of the shape 'shown ini Figure 9; is placed upon some fixed part ,of themach'ine. Mounted anode of the arms ascribe head isa'leverf180 pivoted at 1 81 shown in Flgures 9anjd10.

is pushed upwardly I I The otherend 'f or the lever 188 is rounded as shown .in'

whereupon the pin 178'is moved so the e rounding and c am-V of the reverse movement oft an elongated slot 183 throu h which the pin 178 extends, as shown in F 1 ures 9 and 10. The other end of the lever is provided with a finger 184 mounted to slide lon itudmally in the end of the lever and he d in the position shown in Figure 9 b a spring 185. When the head is move from the position shown in Fi ures 1 and 2 to that shown in Figure 4, 51a arms 96, together with the lever 180, more around the shaft 99 as a center. This movement is in a clock wise direction. with respect to the parts, as

shown in Figure 9, and the finger 184 is moved to the position shownin Fi ure 9, and in its course of movement str' es the rounded surface of the projection 179 and and she. r the roun ingandchamhave been comlpleted, the carriage is moved back and the sad is rotated mm the position shown in Fi re 4 to that shown in igures 1 and 2, an during this operation the finger 184 enge surface of the projection 179 an he 180 is caused to rotate about the bolt jection 179. Afte ering "operations lever .182,

pin 168 enters'th'e slot 167 and holds the game until the pin 168 is .removed thererom.

The head 95 is provided with chamfering -tools 194 and 195 as shown in Figure 4.

The tool 1.94 ehamfers the outside of the pipe and the tool 195 chamfers the inside so that the outer end of the pipe takes the form shown in Figure 7.

The chamferini tools 194 and 195-are carried on the head y holders 196 and .1975're- 'spectively, and are movedinto engagement with the ipe by the 'cam 89. This move mentof t is cham'fering tools is permitted by the telescopic arrangement of the'parts pipe has rounded 'and 156 and 16.6.

After the 4 ehamfered the cam slot in the cam-89 moves the lever 108' in a counterclockwise direction as viewed in Figures 2 and 10. This operation withdraws the carriage along the guideover the prolithe ways and removes the head-fiom the pipe."

It is noted that the bolt 142 locks the car-' riage and the rack 103 together. These parts remain in locked relation until the roller 1 rides up the cam surface of the member. 1 suificiently to remove the bolt 142' from the 'slot'141 in the-rack. Durin e carriage the pin 186 passes-01f of the cam 193 so as to permit the resetting of the pin 168 the notch 167 ofthe member 168- as alreadylexlained. Afterthe lockingbolt 142 is withrawn from the rack, there will be a relative movemenhbetween; the rack and the carriage [which will rotate. the head 95 from the position shown-in Figure 4- to the positionshow'n' in" 1'ai1d'2- I The foregoing completg theoperat on of the machine n to ,and including the rounding and cham ering operations and also the movement of the parts to their initial position. I

We will now describe the operation of unclamping the pipe.

Between the gear 84 and the shaft 83 is speed reducer 198 of any well glared a own construction. This speed reducer reduces the speed'40 ortoone or any other desired ratio. -The speed of the shaft 83 is so reduced that one revolution of the clutch member 82 constitutes a cycle of that part of the. machine which operates upon the pipe. That is to say, a complete cycle of the whole 'machinewith the exception of the clam ing and unclamping'of the pipe. A

A ter the shaft 83 has made a complete revolution and the part 86 of the member 85 has been in ved'tothe position shown in Figure-14,-th counterweight. 72, shownin Fi es 14 and 15, will rock the shaft an act to disengage the clutch member 8.0 from the member 82. Mounted on the member 74,.

.asshown in Figure 15, is a finger 200, pivoted at "201 andheld against rotation in one direction by an adjustable screw 202. The finger 200 when it is moved to the right as viewed in-Fi ure 15 by the counterweight 72, engages. t e member 203,.which'" opens the motor switch 227 and moves the reversfore applied and the drum 20 isheld against rotation. When the motor stops, the switch 227 will be closed-by the spring 231. The coil 230. holds the reversing switch to the right so as to reverse the rotation of the motor. As the motor rotates in the reverse direction the gear 18' rotates the pinions 31 which in turn remove the clamping jaws 34 from the pipe and unclamp thesame.

During the reverse movement of the shaft 83 b reason of the reversal of the motor, a memlzer-204 which is loosely mounted on the shaft 83 is rotated in a counterclockwise direction, as viewed in Figure 16, b the enga ement of a pawl 205 thereonwith a rate et wheel 206 rigidly mounted on the shaft 83. The movement of the member 204 is transmitted through a link 207 to a member 208 pivoted at 209 and having on one end thereof a counterweight 210. The lever 208 carries a finger 211 which is pivoted at 212 and held agalnst rotation in one direction by anadjustable screw 213. The finger 211 in its movement. engages an operating finger through the member 74 and link 7 5. will versing switch 228 is .214 of the switch 215, supported by a bracket 219 attached to the base -1 of the.

214 the circuit of a coil 216' Show; in Figure 18 is opened, whereupon the ain line switch 217 is opened by a spring 218 and the motor and all other electrical parts of the machine are disconnected and the machine S 0 S'- 4 eferring tov Figure 18, it will be noted that the circuits of the motor and brake are shown supplied by current from the line 220 and the switch 217' is held closed by the coil 216 which is connected on. the inside of the switch' 217. The switch 217 connects the wires 221 to the reversingswitch 228. A

machine. Upon the operation of the finger -wire 222 leads from one of the wires 221 throu h. the switch 63 which controls the cir cuit t rough the brake coil 53 and afwire 223 connects-the other side of the coil 53 to the otherwire 221. The arrangement of the switch 217 is such that it must be closed manually. Afterthe switch is closed the coil 216- will hold it closed as long as that coil is energized. Normally, the switch 215 diagrammatically. These parts' are is held'closed by a spring 224 and the re- Y 1 eld in the position to run the motor in the forward direction by a spring 225. The. switch 63 is held closed by gravity when the motor is at rest. A counter electromotive relay coil 226 is connected across the motor armature and acts to hold the switch 63 open as long as the speed of the motor is sufiicient to energize the coil. This coil will hold the switch open after the same has been opened but will not act to open the switch. a

Referring again to the device shown in Figure 16 the parts will assumethe position shown in Figure 16 after the motor is again started and the shaft 83 is rotated about 30 in a. clockwise direction.

The counterweight 210 acts to cause the,member 204 to follow the rotation of the ratchet-wheel 206 until the counterweight strikes the. base and stops. After the plarts reach that point the pawl 205 1nerely c 'cks over. the teeth of the ratchet wheel 206. During this movement bf the parts, the finger 211 asses the member 214 J and is rotated aroun the pivot 212 sufficiently to permit the finger 211 to pass under the end of the member 214.

During that part'of the movement of the brake drum 39, wherein the shoe 54 acts throu h the, various connections heretofore descri ed, toengage the clutch member 80 with the member 82, it willbe noted that the brakes are applied and as a result of which a considerab e friction exists between the shoe 54 and the brake drum. .This friction is sufficient to raise the counterweight 72-and also to force the clutch member 80 into engagement'with the member 82,- and hold it in engagement with the member 82 until the cam 87 or shaft 81 is rotated sufficient] to allow the projection 86 to enter the slot 79. As soon as this operation is completed, the brakes are released and the shoe 54110 longer contacts with the brake drum. By reason of the slotted connection between the extension 55 and the member 68, the shoe 54 may-take the position shown in Figure 3 of the drawings.

he counterweight is held in its elevated position because the clutch members are held In engagement by the member 86. As soon, however, as the shaft 81 has made a complete revolution and the part 86 has been moved to the position shown in Figure 14, the clutch is no longer positively held in engagement b the projection 86 and the counterweight t erefore becomes effective to disengage the clutch and operate the reversing switc 228, as hereinbefore explained.

We will now briefly describe the main features of the operation of my machine. The

ipe to be operated upon is placed in the liolder 20, and the switch 217 is closed manually. This energizes the motor and starts the same and also energizes the brake coil 53 which a plies the brakes to the brake drum 39 and ho ds the pipe holder 20 against rotation. The motor causes the gear 18 to rotate, thus actuating the pinions 31 which move the clamping jaws 34 into engagement with the pipe. As soon as the clamping jaws 34 have moved into engagement with the pipe and sufficient pressure has been created between the jaws and the pipe to stop the rotation of the pinions 31, the holder 20.will be rotated notwithstanding the fact that the brakes are applied at that time, that is to say, the brake drum will rotate. in the brake shoes. This rotation will cause the brake shoe 54 to move in a clockwise direction as viewed in Figure 3, whereby the link 68 will be moved upwardly and the'clutch member 80 moved into engagement with the clutch member 82 through the link 74 and other connecting members. At the end of the movement of the shoe 54 the circuit of thebrake magnet 53 will be opened at the switch 63 and will be held open by coil 226. This will deenergize themagnet 53 and releasethe brakes, whereupon the pipe and pipe holder will rotatefreely. The coil 226 will become effective to hold the switch 63 open and the shoe 54 will take the positlon shown in Figure 3 by reason of the slot connection between extension 55 and member 68. Upon the closing of the clutch, the shaft 81 will begin to rotate and cause the cams 89 and 111 to rotate. The rotation of these cams through the parts already described will cause the cutting tools to cut off the pipe and also cause the head 95 to move from the position shown in Figures 1 and 2 to that shown in Figure 4 and cause the head to enter the end of the pipe. At the proper point in the operatiomas already explained, the pin 168 will be remoiged from the notch 167 and the rollers 157 will be ex,- panded and drawn into the pipe to round out the same, finally assuming the position shown in F igure 7.

During the movement of the head into the pipe the chamfering tools 194 and 195 engage the outside and the inside of the pipe, respectively, and chamfer the same.

s soon as the rounding and chamfering operations have been completed, that is to say, as soon as the cam member 89 has rotated to a predetermined point, the head is removed from the pipe and ultimately rotated to the, positionshown in Figures 1 and 2 and at that time the clutch members 80 and 82 are in condition to be separated and the counterweight 72 becomes effective to separate these clutch members and disconnect the shaft 81 from the shaft 83, whereupon those parts of the machine actuated through the clutch members 80 and 82 come to rest.

As soon as the counterweight 72 becomes effective to disengage the clutch members 80 and 82, it also actuates the reversing switch 228 by the arrangement shown in detail in Figure 15, to reverse the direction of rotation of the driving motor. At this time the magnet 53 becomes again energized and applies thebrakes to the drum 39, thus stopping the pipe holder 20. The motor having een reversed and the brakes applied to the pipe holder, the gear 18 is rotated in a dircction to unolamp the pi e. The unclamping of the pipeis accomp ished by the pinions 31 moving the clamping jaws away from the pipe. During the reverse rotation of the shaft- 83, the main switch 217 is opened by the mechanism shown in detail in Figure 16 as already explained. As soon as the coil 216 is deenergized .iy the opening of the switch 215, the main switch 217 is automatically opened by ,the spring 218, thus deenergizing the motor and the coil 53, whereupon the machine'comes to rest.

From the foregoing it will be seen that means are provided for automatically operating upon the pipe, that is to say, cutting off the pipe, rounding it, chamfering it or performing other operations, and for unclamping the pipe after such operations have been completed.

Our invention has many advantages resulting from the automatic features involved: by reason of these automatic features the sequence of the various IOPEI'HU ms throu bout the cycle is automatically controlled and the operations therefore follow each other rapidly and as a result of WllH'll the machine handles a large volume of matemeans for clamping the pi one operator is sufficient to operate the ma chine in carrying out all of the necessary operations; by reason of the arrangement disclosed, a machine is provided which occupies a minimum space for carrying out the various operations. Many other advantages will be apparent to those skilled in the art.

While we have shown and described the details of a machine embodying our invention, we desire it to be understood that many changes may be made in the mechanical details and arrangements of parts Without departing from the spirit'of our invention.

We claim:

1. A pi machine including an element rotatable m one direction for clamping and turning a piece of pipe and rotatable inthe opposite direction pipe clamped therein pipe cutting means movable into 0 able position when said element is rotating in pipe turning position, means for driving said element in reverse directions, and -means controlled by the pipe clamping element for moving the cutting means into cutting osition when said element is clamping and rotating the pipe, substantially as described. 1

2. In a pipe machine, the combination of means for holding the pipe, means for cutting the pi e, and means controlled by the action of t e holding means for effecting a relative movement between the pipe and the cutting means, substantially as described.

3. In a pipe machine, the ombination of a rotatable holder for the pipe, means for holding the pipe holder against rotation,

' e in the holder,

and means whose operation is dependent on the clamping action of said clamping means for releasing said holder to permitits free rotation, substantially as described.

4. In a ipe machine, the combination of a holder or the ipe, means for clamping the pipe in the ho der, 0. tool for operating on the pipe and means whose operation is dependent upon the clamping action of the clamping means for causing a relative movement between the plpe and the tool, substantially as described.

. 5. In a pipe machine, the combination of a rotatable holder for the pipe, means holding the pipe against rotation, means for clamping the pipe in the holder, and means whose operation is dependent upon the clamping action of the clamping means for permitting the rotation of the pipe, substantially as described.

6. In a pipe machine, the combination of a holder for the pipe, means holding the holder against rotation, means for clamping the pipe if the holder, means actuating the clamping means, and means whose action is dependent upon the clamping means for 'rethe clamping means for actuatin vting off and rounding means, so tantially or releasing the piece of r leasing said holding means, substantially as described. I I i 7. In a pipe machine, the combination of means for clamping the pipe, a plurality of tools operable in sequence upon the pipe, and means controlled by the clamping means for actuating said tools in sequence, substantially as described. 7

8. In a pipe machine, the combination of clamping means for the pipe, means for cutting off said pipe and means controlled by the clamping means ting means, substantially as described.

9. In a pipe machine, the combination of clamping means for the pipe, means for cutting off the pipe, means for rounding out the end of said pipe, and means controlled by said outas described.

10. Ina pipe machine, the combination .of

pipe and means controlled by said cuttingofi" and clamping means for actuating w sai chamfering means, substantially as described.

11. In a pipe machine, the combination of clamping means for the pipe, means for cutting the pipe, a clutch through which the cuttingmcans are actuated, and means controlled by the clamping action of the clamping means foractuatin said clutch to render the cutting means e ective, substantially as described. I

12. In a pipe machine, the combination of means for c amping the pipe, means for cutting ed the pipe, means for rounding the end of the ipe, a clutch through which the cutting o 1 and rounding means are actuated and means controlled by the clamping action of the clamping means for actuating the clutch to'render the rounding means efiective, substantially as described.

13. In a pipe machine, the combination of means for clamping the pipe, means for cutting the pipe, means for rounding and chamfermg the pipe, clamping means for renderin the cutting means and the rounding and chamfering means effective, substantially as described.

14. In a pipe machine, the combination of a holder for the ipe, means for clamping the pipe in the ho der, means preventing rotation of the holder during the clamping action, means for treating the pipe and means controlled by the action of said clamping 'ineans for rendering said pipe treating means effective, substantially as escribed.

15. In a pipe machine, the combination of means for holding the pipe, means for cutting the pipe, means controlled by the action movement betwee he pipe and the cutting for actuating said cutand means controlled by the 7 means, and means for unclamping the pipe,

substantially as described.

16. In a pipe machine, the combination of a rotatable holder for the pipe,means for holding the pipe holder against rotation, means for clamping the pipe in the holder, means whose operation is dependent upon the clamping action of said clamping means for releasing said holder to permit its free rotation, and means for unclamping the pipe, substantially as described.

17. In a pipe machine, the combination of aholder for the pipe, means for clamping the pipe in the holder, a tool for operating on the pipe and means whose operation is dependent upon the clamping action of the clamping means for causing a relative movement between the pipe and the tool, and means for unclamping the pipe, substantially as described.

18. In a pipe machine, the combination of a. holder for the pipe, means for holding the holder against rotation, means for clamping the pipe in the holder, means actuating the clamping means, means whose action is dependent upon the clamping means for releasing said holding means, and means for unclarnpingthe pipe, substantially as described.

19. In a pipe machine, the combination of a rotatable holder, radially acting clamping means movable into and out of clamping position, a gear loosely mounted on said holder and connected with said clamping means, a brake for holding said holder against rotation during clamping and releasing operations, reversible driving means for the gear, a manually operable switch for the brake, and means for releasingithe brake when the holder offers a predetermined resistance thereto, substantially as subscribed. 20. In a pipe machine, the combination of clamping means for the pipe, means for cut-' ting off said pipe, means controlled by the clamping means for actuating said cutting means, and means for unclamping the pipe,- substantially as described.

21. In a pipe machine, the combination of clamping means for the pipe, means for cutting ofi the pipe, means end of said pipe, means controlled by the clamping means for actuating said cutting off and rounding means, and means for unclamping the pipe, substantially as de scribed.

22. In a pipe machine, the combination of clamping means for the pipe, means for cutting ofi the pipe, means for chamfering said pipe, means controlled by said clamping means for actuating said chamtering means, and means for unclamping the pipe, substantially as described.

23. In a pipe mzi'chine, clamping means for the pipe, ting the pipe, a clutch through the combination of means for cutwhich the for rounding out the cutting means are actuated, means controlled by the clamping action of the clamping means for actuating said clutch to render the cutting means effective. and means for unclamping the pipe, substantially as de- 5 and means for unclamping the pipe, substantially as described.

25. In a pipe machine, the combination of means for clamping the pipe, means for cutting the ipe, means for rounding and chamferlng t e pipe, means controlled by the clamping means for renderingthe cutting means and the rounding and chamfering means effective, and means for unclamping the pipe, substantially as described.

26. In a pipe machine, the combination of a holder for the pipe, means for clamping the pipe in the holder, means preventing rotation of the holder during the clamping action, means for treating the pipe, means controlled by the action of said clamping means for rendering said pipe treating means eflective, and means for nnclamping the pipe, substantially as described.

27. In a, pipe machine, the combination of means for clamping the pipe, means for operating upon the pipe, means controlled by the action of the clamping means for rendering the pipe operating means effective, and means actuated upon the completion of the operations upon the pipe for unclamping the pipe, substantially as described.

28'. In a pipe machine, the combination of means for automatically clamping the pipe, means for operating upon the pipe, means actuated upon the completion of the clamping action for automatically rendering said pipe operating means effective, and means actuated upon the completion of the operations on the pipe for automatically rendering the pipe operating means inefl'ective, substantially as described.

1 29. In a pipe machine, the combination of -means for initially automatically clamping tation of t epipe, and means for automatimeans for means and the operating means for rendermg said o crating means effective upon rocally unclamping'the pipe, substantially as described; V

31. In a pi machine, the combination of a holder for t e'pipe, a brake for-the holder, clamping means for the pipe,a gear on the holder and adapted to be iotated on the holder to actuate the clamping meansand thereafter to rotate the holder and pipe, and means for releasing the brake after the'pipe is clamped, substantially as described.

32. Ina pipe machine, the combination of means for holding the pipe, means for rotating the pipe, ineans dependent upon the action of the clamping means for operating upon the ipe and means actuated at a predetermin i time in-the operation of the machine for stopping the operating means, substantially as described.

33. In a pipe machine, the combination of means for holding the pipe, means for rotating the pipe, a eamdevice whose action depends upon the aotion of said holding means, means controlled by said cam device for operating upon the pipe and means rendered efiective upon a predetermined movement of saidcam for stopping the operations upon the: pipe, substantially as described.

34. In a pipe machine, the combination of olding the pipe, means for rotating the pipe, means ependent upon the action of the clamping means for operating upon the pipe, means actuated at a pr'edeten mined time, in the operation of" the machine for stopping the operating means, and

means rendered operative upon the stopping of the operating means for unclamping the pipe, substantially as described.

35. In a pipe machine, the combination of means for holding the pipe, means for retat-in'g the pipe, a cam-device whose action depends upon the action of said holding.

means, means controlled by said cam device for operating uponthe pipe, means rendered effective upon a predetermined movement of said cam for stopping the o erations upon the pipe, and means ren ered operative upon the stopping of the operating means for unelamping the pipe, substani tially as described.

36. In a pipe machine, a pipe holder, clamping means mounted on said holder and adapted to be moved radially, a gear mounted on said holder and operatively connected to said clamping means and means driving said gear to clamp the pipe and to rotate the holder upon the com letion of the clamping action, substantialy as described. I

37. In a pipe machine, the combination (if clamping means for the pipe, pipe working tools, and means controlled by the clamping means for actuating, said tools, substantially as described. i

38. In a pipe machine, the combination of clam ing means forthe pipe, tools for wor gon said pipe, means controlled by the clamping means for actuating said tools, and means for unclamping the pipe upon the conclusion of such operation, substantially as described. a

In testimony whereof we have hereunto set our hands.

GEORGE E. MIRFIELD. WILLIAM M. NECKERMAN. 

